Follow loads of people then unfollow follow loads again then unfollow..... keep doing this...also commentioned and like posts that don't gave lots of likes.....you have to be very active to gain followers and post regularly and you the right hash tags....

1. Posting popular content
2. Use the most popular tags.
3. Mark your location
4. Do not upload photos too often
5. Choose the filter carefully
6. Put together a few photos and tell a story
7. Post photos during peak hours.
8. Only share the best photos and videos
9. Follow others